For over a month now, I haven't been able to properly respond to comments, emails, inquiries, and orders.
I'm trying to reply little by little each Wednesday (our regular closed day),
but I'm nowhere near catching up.
For quick comments that are easy to answer,
I do respond right away,
but I've also accumulated quite a few questions in the comments.
I will get back to everyone eventually, so please bear with me for a while.
"I understand the logic that the GOKISO hub's right flange is too narrow and won't work.
However, from what I can see on the Tri Sports website,
the Tni Evo Hub II has a right flange width that's similarly narrow—is that acceptable?
Or am I misreading the diagram?"
I received a comment along those lines.
Your reading is not incorrect.
The problem is that the definition of "flange width" in the diagram above is non-standard.
With most manufacturers that publish hub dimensions, their "flange width"
refers to the measurement "from the outside of one flange to the outside of the opposite flange."
For example, Shimano also uses outside-to-outside.
Spoke length derived from outside-to-outside measurement is actually "radial spoke length."
With tangential lacing, you alternate radial and tangential spokes through the flange holes,
and the standard radial lacing for bent-head spokes uses tangential spoke holes—
but these are all calculated based on radial spoke length.
Within this margin, spoke thread length absorbs the difference,
so there are no practical issues during assembly.
In the diagram above, "the left and right flange width as stated in this diagram"
is 16.425mm + 36.825mm = 53.25mm,
but this uses a very unusual measurement method of "center-to-center of the flanges."
When measured outside-to-outside, the width is approximately 57.7mm.
When I say "flange width" in this blog, I mean this width.
As a test, I held a caliper set to 53.25mm against it.
Yes, that's the flange center-to-center length.
If you calculate spoke length based on manufacturers' published specifications for both hubs and rims,
you can sometimes run into serious problems.
With the Evo Hub II in the diagram above, the over-locknut dimension is
listed as 65mm + 65mm = 130mm,
but in reality it's all approximately 130.5mm.
Tni also lists the ERD (rim inner diameter/support length) of their AERO 80 rim (the rim for Nomu Lab Wheel No. 3)
as 506mm, but this is also incorrect. It's completely different from actual measurement.
I tried calculating whether it might be a corrected value accounting for internal nipples, but it doesn't match.
The result is that you end up having to measure it yourself.
The internal nipple spoke length correction value is the same for ROAD 38 (the rim for Nomu Lab Wheel No. 2) and ROAD 50 (the rim for Nomu Lab Wheel No. 2.5),
but it differs from the AERO 80 correction value.
Anyway, back on topic—the right flange width of Tni's Evo Hub II
(from the hub center to the outside of the right flange) is in the 18mm range.
This is a standard measurement for an 11-speed hub.
If the outside measurement were in the 16mm range, the spoke tension on the freewheel side would max out immediately
while the non-freewheel side remains loose—resulting in an imbalanced wheel.
You can make it somewhat better with careful lacing technique, but only somewhat.
I'm trying to reply little by little each Wednesday (our regular closed day),
but I'm nowhere near catching up.
For quick comments that are easy to answer,
I do respond right away,
but I've also accumulated quite a few questions in the comments.
I will get back to everyone eventually, so please bear with me for a while.
"I understand the logic that the GOKISO hub's right flange is too narrow and won't work.
However, from what I can see on the Tri Sports website,
the Tni Evo Hub II has a right flange width that's similarly narrow—is that acceptable?
Or am I misreading the diagram?"
I received a comment along those lines.
Your reading is not incorrect.
The problem is that the definition of "flange width" in the diagram above is non-standard.
With most manufacturers that publish hub dimensions, their "flange width"
refers to the measurement "from the outside of one flange to the outside of the opposite flange."
For example, Shimano also uses outside-to-outside.
Spoke length derived from outside-to-outside measurement is actually "radial spoke length."
With tangential lacing, you alternate radial and tangential spokes through the flange holes,
and the standard radial lacing for bent-head spokes uses tangential spoke holes—
but these are all calculated based on radial spoke length.
Within this margin, spoke thread length absorbs the difference,
so there are no practical issues during assembly.
In the diagram above, "the left and right flange width as stated in this diagram"
is 16.425mm + 36.825mm = 53.25mm,
but this uses a very unusual measurement method of "center-to-center of the flanges."
When measured outside-to-outside, the width is approximately 57.7mm.
When I say "flange width" in this blog, I mean this width.
As a test, I held a caliper set to 53.25mm against it.
Yes, that's the flange center-to-center length.
If you calculate spoke length based on manufacturers' published specifications for both hubs and rims,
you can sometimes run into serious problems.
With the Evo Hub II in the diagram above, the over-locknut dimension is
listed as 65mm + 65mm = 130mm,
but in reality it's all approximately 130.5mm.
Tni also lists the ERD (rim inner diameter/support length) of their AERO 80 rim (the rim for Nomu Lab Wheel No. 3)
as 506mm, but this is also incorrect. It's completely different from actual measurement.
I tried calculating whether it might be a corrected value accounting for internal nipples, but it doesn't match.
The result is that you end up having to measure it yourself.
The internal nipple spoke length correction value is the same for ROAD 38 (the rim for Nomu Lab Wheel No. 2) and ROAD 50 (the rim for Nomu Lab Wheel No. 2.5),
but it differs from the AERO 80 correction value.
Anyway, back on topic—the right flange width of Tni's Evo Hub II
(from the hub center to the outside of the right flange) is in the 18mm range.
This is a standard measurement for an 11-speed hub.
If the outside measurement were in the 16mm range, the spoke tension on the freewheel side would max out immediately
while the non-freewheel side remains loose—resulting in an imbalanced wheel.
You can make it somewhat better with careful lacing technique, but only somewhat.